Attaching mechanism for suction cleaner nozzles and the like



Oct. 28, 1930.

c. B. LAWRENCE ATTACHING MECHANISM FOR SUCTION CLEANER NOZZLES AND THE LIKE Filed July 16, 1928 50 Throughout the several figures of the Patented Oct. 28, 1930 UNITED STATES PAT NT. TOFFEE-VI? CHARLES B. LAWRENCE, o cLEvEL-ANn, OHIO, ASSIGNOR .110 THE. P; A. GEIER. COM.-

PANY, or CLEVELAND, OHIO, A CORPORATION OF OHIO o ATTACI-IIN G MECHANISM FOR'SUGTION CLEANER NOZZLES AND THE LIKE Application filed July 16,

My invention relates to improvements in attaching mechanism for suction cleaner nozzles and the like, and has for its object the provision of means for securely attaching and detaching two members in ,co-operative relation, and, more particularly, means for readily functioning to secure a removable nozzle upon its suction cleaner casing, which 7 act in two planes substantially at right angles to each other, which means shall be simple and cheap to construct,and will notdeteri- Crate after normal use and wear of the parts. Several prior structures of this class have appeared in the art for detachably securing l5 suction cleaner nozzles in position, and al- 7 though proving efficient upon initial use, the

wear of the parts results in animperfect independent ofthe suction cleaner in vertical as well as in horizontal planes.

These features have been borne inm nd in completing the instant lmp'rovements, which may best be explained in connection with theaccompanying drawings, wherein:

Figure 1 is a view ofa suction cleaner, shown in side elevation, equippedwith my improvements, 7 j

Fig. 2 is a front view of the suction cleaner An casing and detachable nozzle, shown upon a larger scale,

Fig. 3 is a similar fragmentary View with the nozzle removed, r V I Fig. 4 is a fragmentary side view of the upper portion of the nozzle,

Fig. 5 is a similar front View" tially sectioned, and V Figs. 6 and 7 are rear and side double-locking cam and lever.- 1

thereof, par;

the-flange tightly against its seat a. views of the draw- 1928. Serial no, "292,994.

ings 'I have employed the same character-of reference to indicate similar parts. I In Figure l the fan casinga is shown with front and rear supporting wheelsa and a rearward motor casing a. The handle 1; -(shown broken away) is pivotedatfb adjacent to the adjusting arc bf for holding said handle, when desired, at any par'ticular angle, by means of a transverse bolt cjan'd clamping nut0.-

f At the front of casing a, Fig. 3,there are provided a'pivoted cam lever d andopposing screws 0, e, positioned at 120 about the opening into the fan casing whereon a slightly elevated seatea is designed to receive the -re'arfiange f of the suction cleaner nozzle 7. This flange is adaptably notched at 120 respectively to accommodate the screws' e,e, as at f f as well as the conforming circular portion of the camleve'nas at 7, for the purposes hereinafter explained.

The details of the cam lever,having ithe :doublefunction previously referred to,'inay.

Gan'd 7 The lever d has-a pivotal bore Id, mutilated circular hub '01 and an angular cam face (i Whenthe nozzle is posi- "best be understood by inakingireference to. i V

tionedbefore thefan case'opening, supported by the sp aced screws 0, e, and steadied by the pine, the cam lever maybe actuatedto bring the circular hub cZ into register 'wi'ththe semi-circular slot'f as thelever is turned in a clockwise directiomwhile simultaneously en gaging the inclined =cam-face d? with the flange f in its upper portion adjacent to the slot F. This serves securely to hold the nozzle firmly in position at the front of the fan casing, and prevents its relative movement and possible chattering during the use of the r suction cleaner. It will be seen that the screws e, e, are adjusted to accommodatewith a close fit beneath their heads and hold thelowerportion of the'flange f in position, 7

while the hub d", of lever d depresses the flange vertically against the screws,and the inclined face 03 clamps'the upper portion of also compensates for wear.

Reversely turning the'cam lever d to its u per position shown in Fig. 3, immediate y' 100 This serves to release the flange f adjacent to the lower mutilated area of the lever, whereupon the nozzle may be slightly elevated and tilted to free it from the stops or screws e, e, as well as the normally opposing portions of the locking lever. Thus the nozzle may be removed and replaced by another tool, or the suction cleaner, freed therefrom is better adapted for storage, as in a contracted broom closet.

It will'be understood, particularly referring to Figs. 2 and 6, that the-mutilated portion of the hub d" will serve, if necessary, to afford a camming action and force the flange vertically against its opposing abutments, after which the circular portion of d enters the conforming circular faced slot f thereby serving to hold the flange and nozzle against vertical movement with respect to the fan casing. The cam face (Z simultaneously clamps the flange, acting substantially in a horizontal plane against the seat a and avoids substantial loss of suction between the fan casing a and nozzle 7. By employing the cam lever herein disclosed, 'or an equivalent rotatable locking member, the important double function of accurately positioning and securely locking two separable coacting members is attained, by means acting in planes approximately at right angles to each other.

Having now described the embodiment of my invention and its utility in securely attaching and detaching associated members, I claim as new, and desire to secure by Letters Patent, the following:

Attaching means of the class described, comprising an attaching flange peripherally recessed approximately at 120, the edge of one of saidrecesses forming a cam seat, a coacting member to which the flange is adapted to be attached, and attaching means thereon, including stops registering with two of said recesses, and a rotatable attaching member having cam faces positioned to act upon the recessed edgeand the face of the flange approximately at right angles, substantially as set forth.

In testimony whereof I do now afiix my sig nature, 7

CHARLES B. LAYVRENCE. [L. s] 

